diff --git a/cmd/ingestd/web/app.js b/cmd/ingestd/web/app.js
index 157da00..93f640e 100644
--- a/cmd/ingestd/web/app.js
+++ b/cmd/ingestd/web/app.js
@@ -429,6 +429,7 @@ function renderDashboard(data) {
   const fcWinds = forecast.map((p) => p.wind_m_s);
   const fcGusts = forecast.map((p) => p.wind_gust_m_s);
   const fcRH = forecast.map((p) => p.rh);
+  const fcPrecip = forecast.map((p) => p.precip_mm);
 
   const obsTempSummary = minMax(obsTemps);
   const obsWindSummary = minMax(obsWinds);